6.4% is the change from 422 to 449
Calculation steps:
[( 449 - 422 ) ÷ 422] x 100 = 6.4%
Formula
Percentage change = [(449 - 422) / 422] x 100
Subtract the new number by the original number
449 - 422 = 27
27 ÷ 422 = 0.06398104265402843
0.06398104265402843 x 100 = 6.4%